Community Water System · PWS AS9310751
Aunuu ASG
Pago Pago, American Samoa 96799 - drinking water served from groundwater sources to 402 people, tracked in EPA SDWIS and UCMR5.
- 402
- People served
- 253
- EPA violations
- 60
- Health-based
- Untested
- UCMR5 result
The verdict
EPA records 253 drinking-water violations at Aunuu ASG, 24% of them health-based - above the American Samoa per-system average.
- 253
- Total EPA violations on record
- 24%
- Health-based (MCL / treatment failure)
- 402
- People served by this system
- N/A
- PFAS compounds detected (UCMR5)
Water Quality Snapshot: Aunuu ASG
Aunuu ASG is a state-owned community water system that delivers drinking water to 402 residents in Pago Pago, American Samoa (Eastern District County) through 59 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 253 total violations for this system , of which 60 (24%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 139 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.
The most frequently cited contaminant at this system is TTHM, recorded in 39 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.
Across American Samoa, EPA tracks 91 public water systems serving 50,626 people, with 1,883 cumulative violations and 238 health-based violations on record. About 22% of systems in the state carry at least one violation, and state-wide the average per system is 20.7 violations. Statewide, 1 of 1 UCMR5-tested systems have reported PFAS detections (100%).
Aunuu ASG's 253 violations sit above the American Samoa average.
All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.
System Details
- System Type
- Community
- Owner Type
- State
- Connections
- 59
- County
- Eastern District
- School/Daycare
- No
- MCL Violations
- 57
- Monitoring Violations
- 139
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 39 | 2021 |
| Coliform (TCR) | MR | 27 | 2015 |
| Total Haloacetic Acids (HAA5) | MR | 26 | 2025 |
| TTHM | MR | 26 | 2025 |
| Public Notice | Other | 19 | 2021 |
| Lead and Copper Rule | MR | 15 | 2023 |
| Consumer Confidence Rule | Other | 14 | 2022 |
| Coliform (TCR) | MCL | 10 | 2015 |
| Total Haloacetic Acids (HAA5) | MCL | 7 | 2021 |
| Gross Beta Particle Activity | MR | 7 | 2014 |
| E. COLI | MR | 3 | 2025 |
| Asbestos | MR | 3 | 2025 |
| Nitrate | MR | 2 | 2023 |
| Lead and Copper Rule | TT | 2 | 2012 |
| Endrin | MR | 1 | 2011 |
| Toxaphene | MR | 1 | 2011 |
| Dalapon | MR | 1 | 2011 |
| Diquat | MR | 1 | 2011 |
| Glyphosate | MR | 1 | 2011 |
| Di(2-ethylhexyl) adipate | MR | 1 | 2011 |
| Dinoseb | MR | 1 | 2011 |
| Hexachlorocyclopentadiene | MR | 1 | 2011 |
| Carbofuran | MR | 1 | 2011 |
| Heptachlor | MR | 1 | 2011 |
| Atrazine | MR | 1 | 2011 |
| LASSO | MR | 1 | 2011 |
| 2,3,7,8-TCDD | MR | 1 | 2011 |
| 2,4-D | MR | 1 | 2011 |
| 2,4,5-TP | MR | 1 | 2011 |
| Benzo(a)pyrene | MR | 1 | 2011 |
Verify This Water System
The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Aunuu ASG.
EPA SDWIS, Federal Reports
EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:
View PWS ID AS9310751 on SDWISSource: EPA SDWIS Federal Reports Search
American Samoa Drinking Water Authority
American Samoa's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.
Find AS regulator via EPA SDWISViolation Timeline
Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.
| Year (latest) | Contaminant | Category | Count | EPA Record |
|---|---|---|---|---|
| 2025 | Total Haloacetic Acids (HAA5) | MR | 26 | SDWIS / AS9310751 / 2456 |
| 2025 | TTHM | MR | 26 | SDWIS / AS9310751 / 2950 |
| 2025 | E. COLI | MR | 3 | SDWIS / AS9310751 / 3014 |
| 2025 | Asbestos | MR | 3 | SDWIS / AS9310751 / 1094 |
| 2024 | Revised Total Coliform Rule | TT | 1 | SDWIS / AS9310751 / 8000 |
| 2024 | Revised Total Coliform Rule | MCL | 1 | SDWIS / AS9310751 / 8000 |
| 2023 | Lead and Copper Rule | MR | 15 | SDWIS / AS9310751 / 5000 |
| 2023 | Nitrate | MR | 2 | SDWIS / AS9310751 / 1040 |
| 2022 | Consumer Confidence Rule | Other | 14 | SDWIS / AS9310751 / 7000 |
| 2021 | TTHM | MCL | 39 | SDWIS / AS9310751 / 2950 |
| 2021 | Public Notice | Other | 19 | SDWIS / AS9310751 / 7500 |
| 2021 | Total Haloacetic Acids (HAA5) | MCL | 7 | SDWIS / AS9310751 / 2456 |
| 2015 | Coliform (TCR) | MR | 27 | SDWIS / AS9310751 / 3100 |
| 2015 | Coliform (TCR) | MCL | 10 | SDWIS / AS9310751 / 3100 |
| 2014 | Gross Beta Particle Activity | MR | 7 | SDWIS / AS9310751 / 4100 |
How Aunuu ASG Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | Aunuu ASG | American Samoa avg | Federal benchmark |
|---|---|---|---|
| Total violations | 253 | 20.7 | SDWA compliance, any non-zero count is a recorded breach |
| Health-based violations | 60 | 2.6 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | None | 100% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 402 | 556 | Sizing context for compliance burden |
Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 91 regulated public water systems in American Samoa.
Federal MCL reference, Safe Drinking Water Act thresholds ▼
| Contaminant | Federal MCL / Action Level | Note |
|---|---|---|
| Lead | 0 mg/L (Action Level: 0.015 mg/L) | Lead and Copper Rule treatment technique |
| Arsenic | 0.010 mg/L (10 ppb) | Health-based MCL since 2006 |
| Total Coliform | Treatment technique (RTCR) | Indicator organism, monitoring trigger |
| PFOA / PFOS (PFAS) | 4.0 ppt each (final 2024 rule) | Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026) |
| Nitrate (as N) | 10 mg/L | Acute health risk for infants |
Frequently Asked Questions
Is Aunuu ASG water safe to drink? ▼
How many people does Aunuu ASG serve? ▼
What type of violations does Aunuu ASG have? ▼
Has PFAS been detected in Aunuu ASG water? ▼
What water source does Aunuu ASG use? ▼
Where does this data come from? ▼
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.